Men and women pose on the Derry Dredge, Empire Gold Dredging Company's hydraulic placer bucket-line vessel, near Leadville, Lake County, Colorado. Sign reads: "Derry Dredge - Built by New York Engineering Co."
Empire Gold Dredging Company--Equipment & supplies--1910-1930.; Dredges--Colorado--Lake County--1910-1930.; Lake County (Colo.)--1910-1930.; Gold mining--Colorado--Lake County--1910-1930.; Hydraulic mining--Colorado--Lake County--1910-1930.; Mining...
View of the Derry Dredge, Empire Gold Dredging Company's hydraulic placer bucket-line vessel, near Leadville, Lake County, Colorado. Sign reads: "Derry Dredge - Built by New York Engineering Co."
Empire Gold Dredging Company--Equipment & supplies--1910-1920.; Dredges--Colorado--Lake County--1910-1930.; Lake County (Colo.)--1910-1930.; Gold mining--Colorado--Lake County--1910-1930.; Hydraulic mining--Colorado--Lake County--1910-1930.; Mining...
View of the Newhouse Tunnel and Argo Mill near Idaho Springs (Clear Creek County), Colorado. Boxcars are on the tracks of the Colorado and Southern (C&S) tracks near Clear Creek.
Argo Mill (Clear Creek County, Colo.)--1890-1900.; Newhouse Tunnel (Clear Creek County, Colo.)--1890-1900.; Mills--Colorado--Idaho Springs--1890-1900.; Mining--Colorado--Idaho Springs--1890-1900.
View of the Great Falls (Upper Falls) of the Yellowstone River, Yellowstone National Park, Wyoming. Shows balsalt cliffs, rock formations, pine forests and talus slopes to the river edge.
Upper Falls of the Yellowstone River--1870-1880.; Yellowstone National Park--1870-1880.; Yellowstone River--1870-1880.; Expeditions & surveys--Yellowstone National Park--1870-1880.; Rivers--Yellowstone National Park--1870-1880.;...
View of Mystic Lake near Fort Ellis (Gallatin County), Montana. Shows trees on the shoreline, brush and forest; mountains are in the distance.
Gallatin County (Mont.)--1870-1880.; Mystic Lake (Gallatin County, Mont.)--1870-1880.; Expeditions & surveys--Montana--Gallatin County--1870-1880.; Lakes & ponds--Montana--Gallatin County--1870-1880.; Geological and Geographical Survey of the...